Question: When did Uppsala University start the Gregorian Calendar, was it earlier than 1584
Paraphrase: About the Gregorian Calendar in the Uppsala University, did it start earlier than 1584?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q185246 p:P571 ?s . ?s ps:P571 ?obj . ?s pq:P31 wd:Q26961029 }